Improvement in dies for forming trap-sections



I.' M. CARSON.

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No. 176,835'. l Paume@ May 2,1876.

Memes/64939 fz venian @fw hm N. PETERS, PHOTO-LITHOGRAPHER. WASHINGTON, D t:y

UNITED STATES PATENT TIGE.

JOHN M. CARSON, OF LOUISVILLE, KENTUCKY.

IMPROVEMENT IN DIAES FOR FORMING TRAP-SECTIONS.

Specification forming part of Letters Patent No. 176,835, dated May 2, 1876; application filed April 8, 1876.

To all whom it may concern:

Be it known that I, JOHN M. CARSN, of

` Louisville, in the county ofJeferson and reference being had to `the accompanyin drawings, in which- Figure 1 is a top view of the dies for the lapped or female sections, showing a vertical section of thev trap formed by the dies. Fig. 2 is a top view of the dies for the male section, showing a vertical section of the trap formed by the dies. Fig. 3 is an elevation of the dies for the lapped or female section of the trap, showing also a cross-section of the trap. Fig. 4 is an elevation of the dies for the male section of the trap, showing also a cross-section of the trap. Fig'. 5 represents the lapped or female section in perspective of the trap as it appears when finished. Fig. 6 represents the male section of the trap in perspective when finished. Fig. 7 is a crosssection of the united sections ofthe trap, in thev line :c a: of Fig. 8. Fig. 8 is a vertical central longitudinal section of the trap when finished.`

The nature of my invention consists -of two or more sets of matched dies, in which two or nrore sections of a foul-air trap are formed, one or more of which sections, when formed, having shoulders and lapping edges for coverin g and strengthening the trap at the joints.

My invention consists, further, in the construction ofv a foul-air trap of sections, one or more of which sections are provided with shoulders and lappingA edges for covering and strengthening the joints.

The object of my invention is to produce', by

j dies and from sheet lead or other ductile sheet metal, a very durable and cheap gas-trap, the manufacture of which requires less time, skill, and soldering material than the gas-traps of common manufacture, and which trap is superior in its character to other traps heretofore made;

To enable others skilled in the art to understand my invention, I will proceed to describe it.

In the accompanying drawings, A represents the lower die for shaping the female-half C of a gas-trap, with continuous shoulders or steps a and laps or flanges c along the adjoining edges of the sections of the trap. The said laps are formed by shoulders or steps a in the lower dic A, and by corresponding outer shoulders or steps b on the upper die B. The male half C of the gas-trap is formed in a die of simpler construction, consisting of the lower die A and the upper die B', without any steps, as the said half has no lap or fiange of the above description. The shape of the trap is of the simplest form possible, there being an oval tank, F, a vertical passage, D, and a horizontal passage, E, so united that, to make the trap effective, the sewer or wastepipe G has to be inserted into the passage D,

and below the lower level of the horizontal I passage E.

After the blanks for the described halves are-cut from the sheet metal, (lead being preferred,) they\are laid on the lower dies A and A', according to their intended use, and the upper dies B B/are put on top of them. Partly by pressure of the hand and partly by blows of a mallet or hammenon the rounded or convex backs of the upper dies they are forced down to' their normal positions, when the shaping of the halves O G will be finished. The said halves C C' are now placed together and the flanges c are soldered onto the halves C. The pipe G is then inserted in the manner described, and the trap is finished and ready for use. l

It is a well-known fact that traps of the above description cannot be made by hand the same as traps of a more common construction without so much loss of time as to makethein a very expensive article of manufacture. It is further known that even the primitive mode of construction now resorted to involves great skill, andan unusual amount of soldering material for strengthening and covering up the unavoidable imperfect joints of such traps, whereas with my dies any unskilled person may shape the halves belonging to the trap, and even if the blanks should be imperfectly cut,- they maybe trimmed down in the dies to the correct shape. The work of soldering the halves together is so simple that a boy may in the shortest time learn to do it with great rapidity. In case of very large traps it might be desirable to-inake each pair of dies to form one quarter section of the trap instead of one half; and in such oase, two lapjoints would be formed on each section, just the saine as when the trap is made of two sections. Thus is it seen that with very simple means, and iu very little time, a very strong,` and cheap gas trap is produced by my invention.

Having described my invention, whatI claim, and desire to secure by Letters Patent, is-

l. The combination of the dies A B, havin g ing the steps or shoulders a b and the dies A B-, substantially as land for the purpose set forth.

2. The section G, jointly with the section C of the trap, formed to be united by lap-joints, substantially as and for the purpose herein described.

JOHN MAXWELL CARSON. Witnesses:

HENRY YOUNG, O. L. MILLER. 

